From Nathan Kensinger:
Williamsburg has the highest concentration of stalled development sites in New York City, according to a 2010 report in The Real Deal. This has been the case since at least July 2009, when The New York Post described it as "ground zero in the growing scourge of stalled construction," with more stalled projects then The Bronx, Staten Island or Queens. The number of abandoned projects in Williamsburg has soared since 2009, according to the Brooklyn Paper, which reported in June 2010 that "Brooklyn is pockmarked by a disproportionate number of abandoned development sites compared with the rest of the city... North Brooklyn has been hardest hit." Currently, Williamsburg's stalled projects range from empty condominium towers and unfinished steel frames to huge holes in the ground and vast open fields.